81154011024 has 80 divisors (see below), whose sum is σ = 232984165440. Its totient is φ = 27046448640.

The previous prime is 81154011023. The next prime is 81154011031. The reversal of 81154011024 is 42011045118.

It is a happy number.

81154011024 is a `hidden beast` number, since 8 + 1 + 1 + 540 + 110 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (81154011023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2993659 + ... + 3020645.

It is an arithmetic number, because the mean of its divisors is an integer number (2912302068).

Almost surely, 2^81154011024 is an apocalyptic number.

It is an amenable number.

81154011024 is an abundant number, since it is smaller than the sum of its proper divisors (151830154416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81154011024 is a wasteful number, since it uses less digits than its factorization.

81154011024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33965 (or 33953 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The spelling of 81154011024 in words is "eighty-one billion, one hundred fifty-four million, eleven thousand, twenty-four".